US2450080A - Power take-off device - Google Patents

Description

P 8, 1948. J. H. BURRELL arm. 2,450,080

POWER TAKE OFF DEVICE Filed Sept. 26, 1947 1 1 3 Sheets-Sheet 1 I Z1Z3urrell' N Blfifiicke mv TNT as,

BY W6.

ATIORNEYS p 23, 1948- J. H. BURRELL :rm. 2,450,080

POWER TAKE OFF DEVICE Filed Sept. 26, 1947 3 Sheets-Sheet 2 J jiiflzzrre ZZ INVENTORB,

ATTORNEYS p 1948. H. BURRELL arm. ,450,080

POWER TAKE OFF DEVICE Filed Sept. 26, 1947 3 Sheets-Sheet 3 J22. Erna ZZ Ricke y mm 0R8,

ATTORNEYS.

Patented Sept. 28, 1948 POWER TAKE-OFF DEVICE James H. Burrcll and Paul E. Rickey, Rocky Ford, 0010.

Application September 20, 1941, Serial No. 776,344

4 Claims. 1

This invention relate to power take-of! devices designed primarily as a means for taking oil power from tractors.

In known tractor take-off mechanisms, it is necessary to cut off the power to the machine receiving power from the tractor, when the tractor is not in motion. It is, therefore, :theprimary object of the present invention to provide means to supply power to farm machinery continuously, whether the tractor supplying the power is in motion or not.

Another important objectof the invention is to provide a power take-oi! coupled with the front end of the engine, delivering the Power at the rear end of the engine for operating the mech-- anism associated therewith.

With the foregoing and other objects in view which will appear as the description proceeds,

the invention consists of certain novel details of construction and combinations of parts, hereinafter more fully described and pointed out in the claims, it being understood that changes may be made in the construction and arrangement of parts without departing from the spirit of the invention as claimed.

- Referring to the drawings:

Figure 1 is an elevational view illustrating a' Figure 5 is an enlarged fragmental elevational view illustrating the coupling at one end of the power take-off mechanism.

sure 61s a sectional view takenon line H of Figure 1. Y

Figure '7 is a sectional view taken on line 1-1 of Figure 6.

Referring to the drawings in detail, the reference character 5 indicates the forward end of the crank shaft of the tractor, the shaft being usually supplied with the cranking handle, not shown.

Secured to the forward end of the crank shaft 5 are pulleys 6 which are of the V-groove type, to'accommodate the V-belts 'I that operate over the substantially large pulleys 8, which are secured to the power shaft 9 of the power take-of! mechanism.

The power shaft 8 is encased in the tubular housing It that extends the full length of the 2 Jacent to the pulley 8, while the rear end thereof extends beyond the rear of the tractor, as clearly shown by Figure 1. ,The reference character I 1 indicates a bracket which is formed with the bearing I! at its upper end, in which the shaft 6 rotates, the lower end of the bracket ii being connected with the housing It, supporting the forward end of the housing. Secured to the housing 10 is a circular housing 14 to which the arms ill of the bracket l6 are welded, the bracket it having a right-angled end ll fitted in an opening of the member 18 which is bolted to the tractor. the end ll of the bracket 16 being square to fit within the square opening of the member l8, where it is held in place by mean of the set screw 19. The housing 14 is provided with a disc 20 that operates therein, the disc 20 being formed with an opening through which the housing i0 extends, the opening being eccentrically formed within the disc, so that when the disc is rotated within the housing, the shaft 9 will be moved vertically to the end that the pulleys 8 at the ends thereof will be moved slightly to either cause slack in the belts I so that there will be slippage between the belts and pulleys, or tightened so that the belts will tightly engage the pulleys, transmitting movement from the shaft 5 to the shaft 9.

The operation of the tubular-housing to accomplish this result, is carried out by means of the lever 2|, which is shown as secured to the housing l0 adjacent to the take-ofl end of the power shaft 9.

The housing I 0 operates in an opening formed in the bracket 22, which is bolted to the bar 23 of the tractor frame.

The bracket 22 has an inwardly extended flange 24 formed with notches 25 that accommodate the lever 21 to hold the lever in its positions of adjustment. A coiled spring indicated by the reference character 26 has one of its ends connected to the bracket 22, while the opposite end thereof connects with the lever ii to normally pull the lever 2| in one direction to secure it in its positions of adjustment. On one end of the power shaft 9 is a coupling 21 which may be connected with any suitable mechanism to be operated by the device.

From the foregoing it will be seen that due to the construction shown and described, I have provided means whereby the power shaft 9 may be readily and easily clutched or unclutched with respect to the crank shaft 5, either while the tractor is stationary, or while the tractor is tractor, the front end extending to a point admoving.

Having thus described the invention, what is claimed is:

1. The combination with the crank shaft of a tractor, of a power take-oi! comprising pulleys secured to the crank shaft. a tubular power shaft housing mounted on the tractor. a power shaft mounted within the tubular shaft housing, pulleys on the power shaft, belts operating over the pulleys of the crank shaft, transmitting m ment of the crank shaft to the power shaft, a support for the tubular power shaft housing, comprising a circular housing, a bracket to which the circular housing is secured, the bracket being secured to the tractor, a disc eccentrically secured to the power shaft housing. fitted within the circular housing, and means for rotating the tubular power shaft housing and disc within the circular housing, whereby the pulleys of the power shaft are moved towards or away from the pulleys of the crank shaft, loosening or tightening the belts, and regulating the operation of the power shaft.

2. The combination with the crank shaft of a tractor, of a power take-oi! comprising pulleys secured to the crank shaft, a tubular power shaft housing mounted for pivotal, movement on the tractor and extending fromthe front end of the tractor to the rear end thereof, a power shaft mounted within the power shaft housin pulleys on the power shaft, belts moving over the pulleys, transmitting movement from the crank shaft to the power shaft, and-means for moving the tubular shaft housing and power shaft supported therein. towards or away from the crank shaft, regulating the tension on the belts, controlling the operation of the power shaft.

3. The combination with the crank shaft of a tractor, of a power take-ofi comprising pulleys secured to the crank shaft, a tubular power shaft housing mounted on the tractor, directly under the tractor, a power shaft mounted within the tubular housing, pulleys mounted on the power shaft, belts operating over the pulleys transmitting movement of the crank shaft to the power shaft, a lever connected with the power shaft housing by means of which the tubular shaft housing is rotated, a. circular bracket in which the tubular shaft housing is eccentrically mounted, whereby rotary movement of the power shaft housing moves the pulleys of the power shaft towards or away from the pulleys of the crank shaft, tightening or loosening the belts, controlling the rotation of the pulleys and power shaft.

4. The combination with the crank shaft of a tractor, of a power take-off comprising pulleys secured to the crank shaft, a tubular power shaft housing mounted on the tractor, a power shaft operating within the tubular power shaft housing, pulleys secured to the forward end of the power shaft, belts operating over the pulleys, the rear end of the power shaft extending beyond the rear end of the tractor, means for moving the forward end of the power shaft towards or away from the crank shaft, regulating the tension on the belts, whereby the operation of the power shaft is regulated.

JAMES H. BURRELL. PAUL E. RICHEY.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,323,490 Putnam Dec. 2, 1919 2,140,687 Brown Dec. 20, 1938

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